Nagasaki: After the Attack

Tuesday marked exactly 71 years after the bombing of Nagasaki, Japan, which reduced the city to rubble days after the bombing of Hiroshima.

(AP Photo)

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Nagasaki: The Attack

Smoke billowing over Nagasaki after the atomic bomb was dropped.

(REUTERS)

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Nagasaki: Now

The Urakami Cathedral, center, which was destroyed in the atomic bombing of Nagasaki and rebuilt in 1959.

(REUTERS/Issei Kato)

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Detroit: Booming in the 1940s

The city at night in 1942.

(AP Photo)

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Detroit: Then

Downtown Cadillac Square in 1942. Building at left foreground is the City Hall.

(AP Photo)

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Detroit: Now

A demolition crew razes the legendary Eastown Theatre in a blighted east side neighborhood in Detroit, in November 2015.

(REUTERS/Rebecca Cook)

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Detroit: Rebuilding

Crews work on constructing the new M-1 Rail streetcar project along Woodward Avenue in Detroit, in December 2015. The city's plan to demolish half of its nearly 80,000 blighted or deteriorating structures -- nearly one in three city buildings -- is showing some signs of success.